[IR] `select` should reject token-like types Target extension types with the IsTokenLike property are meant to behave like tokens. The change in #154620 already rejected such types in phi nodes, function arguments, function return types and call parameters. Added this missing check in SelectInst::areInvalidOperands(). Also refactored PHINode to follow the same pattern, so that the token type is checked in the constructor, LLParser and Verifier. Some DirectX lit tests deliberately use token-like types in Phi or Select instructions, while disabling the verifier. This change breaks all of them because the check is in more places than just the verifier. Assisted-By: AI Code Assistant wip
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